sup fellas im running the same set up but my heads are from a ls2 gto nd im using ls7 lifters does that make a diff on how much i mill on a dish top 5.3 by mine haveing the bigger valves??what should i mill them to and what size pushrods do i need to run??? thanks

 

Ok guys, I have a '00 rcsb with a 5.3. I have shorty headers, K&N cai, Flowmaster cat-back, Hyperpp. I recently bought a set of 243/799 heads that came off a '07 C6 Corvette, one head has yellow springs and the other has black ones. Is this how they come or are they blowing smoke up my @$$? Also I bought a FAST intake 102mm for my 5.3. What do you recomend I cnc the heads down to? and What cam do you recomend?

 

Ls2??/ 317 heads? Those come with 72cc chambers I think.. not worth putting those on ur 5.3 ur gonna loose compression ..